Copper appears after silver, and has a great affinity t& 

 that metal. It is itself succeded by tin, lead, and iron; 



Those compounds which differ from rnetals only by 

 their not being malleable, bear a great resemblance to- 

 them, and are- called demi-metals. Such are antimony 9 

 Ms?nuth, spelter. 



Fitriols, produced by the union" of metallic particles 

 with a coagulated acid, seem to be the passage froiii 

 metallic substances to salts, 



which always affect deierrniimte and ' constant 

 figures, indicate thereby the invariableness and simplicity 

 of their principles, whose fundamentals are water and 

 earth. 



When they are dissolved by water, or volatilised by 

 air, they become one of the principal causes of the 

 growth of vegetables, as they are of fermentations, 

 whose effects are so various and extensive, 



The regularity and uniformity of the different' kinds 

 6f crystallization, sufficiently prove that they are to be 

 attributed t6 salts, which -being dissolved und conveyed 

 by a liquid, and united to foreign matters* compose 

 these pyramidal masses.- 



Stones, whose species are so numerous, present us with 

 masses of every form, colour, size, and consistence, ac- 

 cording to the diversity of liquids, earth, sulphur, me- 

 tallic parts^ salts, places, and other circumstances 

 which contributed to their formation. 



Some of them are perfectly transparent] and these 

 seem to be the most simple, Others are more or less 

 opake, as their principles-are -more or less 'heterogeneous?, 

 or more -of less- mixed* 



5. The apparent organization of leafed stones, or 

 such as are divided into layers, as slates ; that of fibrous 



